Effect of inoculum density of rice root knot nematode on growth of rice cv. Masuli and nematode development

Poudyal, Damodar; Pokharel, Ridish K.; Shrestha, Sundar Man; Khatri-Chetri, G. B.

doi:10.1071/ap05011

Cited by 12 publications

(7 citation statements)

References 7 publications

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“…In the meantime, GI was indexed on a 0−10 scale based on the previously reported methods. 43 N N GI (%) ( related index)/ 10 100…”

Section: Methodsmentioning

confidence: 99%

“…After 60 days of treatment, the plant height, the fresh weights of the plant, and the galling index (GI) were recorded to evaluate the control efficacy (CE) of Ave-IL@MSN@TA-Cu microcapsules against RKN. In the meantime, GI was indexed on a 0–10 scale based on the previously reported methods where N i is the plant numbers allocated to an individual index, N t is the total number of plants investigated, GI c is the galling index of negative control, and GI t is the galling index of the treatment group.…”

Section: Methodsmentioning

confidence: 99%

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One-Pot Facile Synthesis of Double-Shelled Mesoporous Silica Microcapsules with an Improved Soft-Template Method for Sustainable Pest Management

Zhou

Gao

Chen

et al. 2021

ACS Appl. Mater. Interfaces

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A controlled release formulation based on silica microcapsules is an ideal selection to improve both the effective utilization and duration of pesticides to decrease ecological damage. Herein, a simple and green method for preparing double-shelled microcapsules was developed using a newly prepared quaternary ammonium ionic liquid (IL) as the functional additive to entrap avermectin (Ave) in mesoporous silica nanospheres (MSNs) and tannic acid−Cu (TA−Cu) complex as the sealing agent to form the core−shell structure (Ave-IL@MSN@ TA-Cu). The obtained microcapsules with an average size of 538 nm had pHresponsive release property and good stability in soil. The half-life of microcapsules (34.66 days) was 3 times that of Ave emulsifiable concentrate (EC) (11.55 days) in a test soil, which illustrated that microcapsules could protect Ave from rapid degradation by microorganisms by releasing TA, copper, and quaternary ammonium in the soil. Ave-IL@MSN@TA-Cu microcapsules had better nematicidal activity and antibacterial activity than Ave EC due to the synergistic effect of Ave, IL, and copper incorporated in the microcapsules. Pot experiments showed that the control efficacy of microcapsules was 87.10% against Meloidogyne incognita, which is better than that of Ave EC (41.94%) at the concentration of 1.0 mg/plant by the root-irrigation method after 60 days of treatment owing to the extended duration of Ave in microcapsules. The simple and green method for the preparation of doubleshelled microcapsules based on natural quaternary ammonium IL would have tremendous potential for the extensive development of controlled release pesticide formulations.

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“…In the meantime, GI was indexed on a 0−10 scale based on the previously reported methods. 43 N N GI (%) ( related index)/ 10 100…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

One-Pot Facile Synthesis of Double-Shelled Mesoporous Silica Microcapsules with an Improved Soft-Template Method for Sustainable Pest Management

Zhou

Gao

Chen

et al. 2021

ACS Appl. Mater. Interfaces

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show abstract

“…At the same time, according to the previously reported method, disease grade is indexed on a scale of 0-10. 43…”

Section: Greenhouse Assaysmentioning

confidence: 99%

ROS‐responsive modified chitosan oligosaccharide nanocapsules for improving pesticide efficiency and intelligent release

Zhao

Wang

et al. 2023

Pest Management Science

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BACKGROUNDSome traditional pesticide formulations are inefficient, leading to excessive use and abuse of pesticides, which in turn effects environment. Intelligent release pesticide formulations are ideal for improving pesticide utilization and persistence while reducing environmental pollution.RESULTSWe designed a benzil‐modified chitosan oligosaccharide (CO‐BZ) to encapsulate avermectin (Ave). Ave@CO‐BZ nanocapsules are prepared based on a simple interfacial method via cross‐linking of CO‐BZ with diphenylmethane diisocyanate (MDI). The Ave@CO‐BZ nanocapsules have an average particle size of 100 nm and exhibited a responsive release performance for ROS. The cumulative release rate of nanocapsules at 24 h with ROS increased by about 11.4% compared to that without ROS. The Ave@CO‐BZ nanocapsules displayed good photostability. Ave@CO‐BZ nanocapsules can penetrate root‐knot nematodes more easily and exhibited better nematicidal activity against root‐knot nematodes. The pot experiment showed that the control effect of Ave CS at low concentration was 53.31% at the initial stage of application (15 d), while Ave@CO‐BZ nanocapsules was 63.54%. Under the same conditions, the control effect of Ave@CO‐BZ nanocapsules on root‐knot nematodes was 60.00% after 45 days of application, while Ave EC was only 13.33%. The acute toxicity experiments of earthworms showed that the toxicity of nanocapsules was significantly lower than that of EC.CONCLUSIONThe ROS‐responsive nanocapsules can improve the utilization of pesticides and non‐target biosafety. This modified chitosan oligosaccharide has great potential as a bio stimuli‐responsive material, and this simple and convenient method for preparing Ave@CO‐BZ nanocapsules provides a direction for the effective utilization of pesticides. © 2023 Society of Chemical Industry.

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“…Meloidogyne graminicola is one of the most economically important root-knot nematodes and is becoming a serious pest, particularly in rice-wheat cropping systems in the Indo-Gangetic plains of South Asia and rice producing areas of southeast Asia [ 1 , 2 ]. In India, this disease was first reported by Israel et al [ 3 ], and, later, the disease was reported from different states by many scientists viz., Andhra Pradesh [ 4 ], Assam [ 5 ], Bihar [ 6 ], Haryana [ 7 ], Tripura [ 8 ], Uttar Pradesh [ 9 - 11 ] and from West Bengal [ 12 ].…”

mentioning

confidence: 99%

“…In India, this disease was first reported by Israel et al [ 3 ], and, later, the disease was reported from different states by many scientists viz., Andhra Pradesh [ 4 ], Assam [ 5 ], Bihar [ 6 ], Haryana [ 7 ], Tripura [ 8 ], Uttar Pradesh [ 9 - 11 ] and from West Bengal [ 12 ]. M. graminicola is a well-established pest of sandy loam to loamy sand soil [ 2 ] and can cause yield losses of 20~80% [ 13 , 14 ]. However, the reduction in grain yield was up to 98% in pot experiments [ 15 ].…”

mentioning

confidence: 99%

Use ofDactylaria brochopaga, a Predacious Fungus, for Managing Root-Knot Disease of Wheat (Triticum aestivum) Caused byMeloidogyne graminicola

Kumar

Singh

2011

Mycobiology

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A laboratory experiment was conducted to study the induction of constricting rings and test predation of Dactylaria brochopaga isolates against second stage juveniles (J2s) of Meloidogyne graminicola. Among the five fungal isolates, isolate D showed the greatest number of predatory rings and, consequently, trapped the maximum number of M. graminicola J2s in dual cultures. Another pot experiment was conducted to study the effect of D. brochopaga (isolate D) on the management of wheat root-knot disease. Applying a mass culture (10 g/pot) and a spore suspension of the fungus with and without cow dung manure to soil infested with 2,000 M. graminicola juveniles significantly improved plant height, root length, weights of shoots, roots, panicles and grains per hill compared to those in the control. Moreover, the fungus significantly reduced the number of root-knots, the number of egg masses, juveniles, and females per hill compared to those in the control. Bio-efficacy of the fungus was heightened when the mass culture and a spore suspensions were used in combination with cow dung manure to improve the plant growth parameters and reduce the number of root-knot and reproductive factors. Further investigations should be conducted to identify the impact of this fungus in the field.

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Effect of inoculum density of rice root knot nematode on growth of rice cv. Masuli and nematode development

Cited by 12 publications

References 7 publications

One-Pot Facile Synthesis of Double-Shelled Mesoporous Silica Microcapsules with an Improved Soft-Template Method for Sustainable Pest Management

One-Pot Facile Synthesis of Double-Shelled Mesoporous Silica Microcapsules with an Improved Soft-Template Method for Sustainable Pest Management

ROS‐responsive modified chitosan oligosaccharide nanocapsules for improving pesticide efficiency and intelligent release

Use ofDactylaria brochopaga, a Predacious Fungus, for Managing Root-Knot Disease of Wheat (Triticum aestivum) Caused byMeloidogyne graminicola

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